Heather Maertens can’t live without these five things in her Lusby, Md., storeCOMING CLEANWe order small polishing cloths and jewelry cleaners with our store logo. We put them in the bag for special clients and give them out at special events. People love them.EYES ON THE SIZEWe keep inexpensive plastic ring sizers on hand. We let people take them home to size their spouses’ fingers, etc. It is nice for people who have busy schedules and can’t make it in during regular hours. RAZZLE DAZZLE ’EMWe love Connoisseurs Diamond Dazzle Stiks…for quickly cleaning jewelry. We give them as gifts to clients and sell them like crazy.Heather MaertensTOP OF THE GLASSI live in my half-frame magnifying glasses. They are perfect for bench jewelers that do not wear glasses…much less cumbersome than OptiVISORs. The staff uses them for changing watch batteries, etc. THE WHEEL DEALWe ord